Anisotropic Cosmology in the Local Limit of Nonlocal Gravity

被引：4

作者：

Tabatabaei, Javad ^{[1
]}

Banihashemi, Abdolali ^{[1
]}

Baghram, Shant ^{[1
]}

Mashhoon, Bahram ^{[2
,3
]}

机构：

[1] Sharif Univ Technol, Dept Phys, Tehran 111559161, Iran

[2] Inst Res Fundamental Sci IPM, Sch Astron, Tehran 193955531, Iran

[3] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

来源：

UNIVERSE | 2023年 / 9卷 / 09期

关键词：

nonlocal gravity; cosmology; cosmic acceleration;

D O I：

10.3390/universe9090377

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Within the framework of the local limit of nonlocal gravity (NLG), we investigate a class of Bianchi type I spatially homogeneous but anisotropic cosmological models. The modified field equations are presented in this case, and some special solutions are discussed in detail. This modified gravity theory contains a susceptibility function S(x) such that general relativity (GR) is recovered for S = 0. In the modified anisotropic cosmological models, we explore the contribution of S(t) and its temporal derivative to the local anisotropic cosmic acceleration. The implications of our results for observational cosmology are briefly discussed.

引用

页数：16

共 56 条

[1] Planck 2018 results: VI. Cosmological parameters [J].

Aghanim, N. ;

Akrami, Y. ;

Ashdown, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Ballardini, M. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartolo, N. ;

Basak, S. ;

Battye, R. ;

Benabed, K. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bock, J. J. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Boulanger, F. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cardoso, J. -F. ;

Carron, J. ;

Challinor, A. ;

Chiang, H. C. ;

Chluba, J. ;

Colombo, L. P. L. ;

Combet, C. ;

Contreras, D. ;

Crill, B. P. ;

Cuttaia, F. ;

de Bernardis, P. ;

de Zotti, G. ;

Delabrouille, J. ;

Delouis, J. -M. ;

Di Valentino, E. ;

Diego, J. M. ;

Dore, O. ;

Douspis, M. ;

Ducout, A. ;

Dupac, X. ;

Dusini, S. ;

Efstathiou, G. ;

Elsner, F. ;

Ensslin, T. A. ;

Eriksen, H. K. ;

Fantaye, Y. .

ASTRONOMY & ASTROPHYSICS, 2020, 641

[2] Constraints on a Bianchi type I spacetime extension of the standard ΛCDM model [J].

Akarsu, Ozgur ;

Kumar, Suresh ;

Sharma, Shivani ;

Tedesco, Luigi .

PHYSICAL REVIEW D, 2019, 100 (02)

[3] Planck 2018 results: VII. Isotropy and statistics of the CMB [J].

Akrami, Y. ;

Ashdown, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Ballardini, M. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartolo, N. ;

Basak, S. ;

Benabed, K. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bock, J. J. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Boulanger, F. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cardoso, J. -F. ;

Casaponsa, B. ;

Chiang, H. C. ;

Colombo, L. P. L. ;

Combet, C. ;

Contreras, D. ;

Crill, B. P. ;

de Bernardis, P. ;

de Zotti, G. ;

Delabrouille, J. ;

Delouis, J. -M. ;

Di Valentino, E. ;

Diego, J. M. ;

Dore, O. ;

Douspis, M. ;

Ducout, A. ;

Dupac, X. ;

Efstathiou, G. ;

Elsner, F. ;

Ensslin, T. A. ;

Eriksen, H. K. ;

Fantaye, Y. ;

Fernandez-Cobos, R. ;

Finelli, F. ;

Frailis, M. ;

Fraisse, A. A. ;

Franceschi, E. ;

Frolov, A. ;

Galeotta, S. .

ASTRONOMY & ASTROPHYSICS, 2020, 641

[4]

Aldrovandi R., 2013, Teleparallel Gravity: An Introduction

[5]

[Anonymous], 1962, Gravitation: An Introduction to Current Research

[6] LIGHT-ELEMENTS AND ISOTROPY OF UNIVERSE [J].

BARROW, J .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1976, 175 (02) :359-370

[7] NINE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: FINAL MAPS AND RESULTS [J].

Bennett, C. L. ;

Larson, D. ;

Weiland, J. L. ;

Jarosik, N. ;

Hinshaw, G. ;

Odegard, N. ;

Smith, K. M. ;

Hill, R. S. ;

Gold, B. ;

Halpern, M. ;

Komatsu, E. ;

Nolta, M. R. ;

Page, L. ;

Spergel, D. N. ;

Wollack, E. ;

Dunkley, J. ;

Kogut, A. ;

Limon, M. ;

Meyer, S. S. ;

Tucker, G. S. ;

Wright, E. L. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2013, 208 (02)

[8] SEVEN-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: ARE THERE COSMIC MICROWAVE BACKGROUND ANOMALIES? [J].